What is the process in which muscles contact to move food throughout the digestive system

Which statement is true about the cell theory? a) it is well-supported by evidence. b) it is unchangeable and permanent.

Which element forms the basis of all organic organisms a carbon b oxygen c hydrogen d nitrogen

Abiologist counts the number of rabbits in a population each year and observes a decrease in population. since the coyote population has exploded, the biologist concludes that the coyote population has had a negative interaction with the rabbit population. which describes the biologist’s actions? a.) experimentationb.) inferencec.) observationd.) interacting